L-CYSTEINE (13C3,D3,15N) is an isotopically labeled, naturally occurring sulfur-containing amino acid in the cysteine class, bearing a thiol-bearing side chain and the standard amino acid backbone. The molecule contains an amino group and a carboxyl group, while the side-chain thiol provides a reactive sulfhydryl functionality that can participate in redox and thiol-disulfide exchange chemistry, and the isotopic composition (13C3, D3, 15N) enables mass-dependent detection and tracing. L-CYSTEINE (13C3,D3,15N) is used in isotopic labeling and analytical method development for studies involving amino acid quantification, peptide or protein sample preparation where cysteine residues are monitored, and chemical biology experiments that track incorporation or transformation of cysteine-containing motifs.
CAT No: L-Iso-0178
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